Reverse order flag for polygon picking

Core/Contents/Include/PolyRenderer.h

@@ -212,7 +212,7 @@ namespace Polycode {
 		
 		void addShaderModule(PolycodeShaderModule *module);
 		
-		virtual bool test2DCoordinateInPolygon(Number x, Number y, Polygon *poly, const Matrix4 &matrix, bool testBackfacing, bool ortho, bool billboardMode, Matrix4 *adjustMatrix = NULL);
+		virtual bool test2DCoordinateInPolygon(Number x, Number y, Polygon *poly, const Matrix4 &matrix, bool ortho, bool testBackfacing, bool billboardMode, bool reverseDirection = false, Matrix4 *adjustMatrix = NULL);
 		
 		virtual Matrix4 getProjectionMatrix() = 0;
 		virtual Matrix4 getModelviewMatrix() = 0;

Core/Contents/Source/PolyRenderer.cpp

@@ -78,7 +78,7 @@ void Renderer::setExposureLevel(Number level) {
 }
 
 
-bool Renderer::test2DCoordinateInPolygon(Number x, Number y, Polycode::Polygon *poly, const Matrix4 &matrix, bool ortho, bool testBackfacing, bool billboardMode, Matrix4 *adjustMatrix) {
+bool Renderer::test2DCoordinateInPolygon(Number x, Number y, Polycode::Polygon *poly, const Matrix4 &matrix, bool ortho, bool testBackfacing, bool billboardMode, bool reverseDirection, Matrix4 *adjustMatrix) {
 
 	Vector3 dirVec;
 	Vector3 origin;
@@ -126,19 +126,44 @@ bool Renderer::test2DCoordinateInPolygon(Number x, Number y, Polycode::Polygon *
 	
 	
 	if(poly->getVertexCount() == 3) {
-		retStatus = rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(2)), &hitPoint);
-		if(testBackfacing && !retStatus) {
+	
+		if(reverseDirection) {
+			retStatus = rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(0)), &hitPoint);
+			if(testBackfacing && !retStatus) {
+			retStatus = rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(2)), &hitPoint);
+		
+			}		
+		} else {
+			retStatus = rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(2)), &hitPoint);
+			if(testBackfacing && !retStatus) {
 			retStatus = rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(0)), &hitPoint);
 		
+			}
 		}
 	} else if(poly->getVertexCount() == 4) {
+	
+		if(reverseDirection) {
+		
+		retStatus = (rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(2)), &hitPoint) ||
+				rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(3)), fullMatrix *  (*poly->getVertex(0)), &hitPoint));
+		if(testBackfacing && !retStatus) {
+			retStatus = (rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(0)), &hitPoint) ||
+				rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(3)), fullMatrix *  (*poly->getVertex(2)), &hitPoint));
+		
+		}	
+		
+		
+		} else {
+		
 		retStatus = (rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(0)), &hitPoint) ||
 				rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(3)), fullMatrix *  (*poly->getVertex(2)), &hitPoint));
 		if(testBackfacing && !retStatus) {
 			retStatus = (rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(0)), fullMatrix  * (*poly->getVertex(1)), fullMatrix *  (*poly->getVertex(2)), &hitPoint) ||
 				rayTriangleIntersect(origin, dirVec, fullMatrix * (*poly->getVertex(2)), fullMatrix  * (*poly->getVertex(3)), fullMatrix *  (*poly->getVertex(0)), &hitPoint));
 		
-		}				
+		}	
+		
+		}			
 	} else {
 		retStatus = false;
 	}